For just one mana, its a really strong play that can just be cashed in for value too
UWR Control for Legacy
The top eight decks roughly account for all tier one and most tier two decks
When she hits the battlefield, she pulls out your favorite Ally, and for WUBRG, she gives your field a massive buff
This corresponds to the oft-quoted 40% likelihood: P (1,7,4,60) + P (2,7,4,60) + P (3,7,4,60) + P (4,7,4,60) = 39.9% Returning to our initial question, if our deck contains nine one-drops, what percentage of seven-card starting hands would contain at least one one-drop
As a green win condition it's risky since it hits yourself as well